That’s because it’s not the purpose of FFW to give you tools or advice or structure for running an interstellar war in Traveller. It’s a setting and the fleet and army’s book are resources for running a game in that setting, you complain that they are lore focus but that exactly what a setting is about.War Fleets, ICS Papers, Armies, etc were fun to read (except the TL 12 Army bit). I don't regret buying them. But they are just loregasms. They don't give me any tools or advice or structures for actual play that I didn't already have. I can run an interstellar war in Traveller just as well now as I could before I bought them.
Also what wrong with a TL 12 Army it make sense on so many levels?